throw warning instead of error when pagination element not found

Author: fieg

src/assert.js

@@ -18,5 +18,14 @@ export default {
     if ($element.length === 0) {
       throw new Error(`Element "${elementOrSelector}" not found for "${property}"`);
     }
+  },
+  warn(fn, ...args) {
+    try {
+      fn(...args)
+    } catch (e) {
+      if (console && console.warn) {
+        console.warn(e.message)
+      }
+    }
   }
 }

src/pagination.js

@@ -33,7 +33,7 @@ export default class Pagination {
       return;
     }
 
-    Assert.anyElement(this.options.element, 'pagination.element');
+    Assert.warn(Assert.anyElement, this.options.element, 'pagination.element');
 
     ias.on(Events.BINDED, this.hide.bind(this));
     ias.on(Events.UNBINDED, this.restore.bind(this));

test/pagination_spec.js

@@ -124,28 +124,20 @@ describe('Pagination', () => {
       });
   });
 
-  it('should throw when element not found', () => {
+  it('should warn when element not found', () => {
     cy.InfiniteAjaxScroll().then((InfiniteAjaxScroll) => {
-      const subject = {
-        ias: () => {
-          new InfiniteAjaxScroll('.blocks', {
-            item: '.blocks__block',
-            next: '.pager__next',
-            pagination: '.pager_does_not_exist',
-            bind: false
-          });
-        }
-      };
-
-      const spy = cy.spy(subject, 'ias');
-
-      try {
-        subject.ias();
-      } catch (e) {
-        // noop
-      }
+      cy.window().then((win) => {
+        const spy = cy.spy(win.console, 'warn');
+
+        let ias = new InfiniteAjaxScroll('.blocks', {
+          item: '.blocks__block',
+          next: '.pager__next',
+          pagination: '.pager_does_not_exist',
+          bind: false
+        });
 
-      expect(spy).to.have.thrown('Error');
+        expect(spy).to.have.been.called;
+      });
     });
   });